To convert the mixed number 5 3/4 to an improper fraction, we need to first multiply the whole number (5) by the denominator of the fraction (4) and add the numerator of the fraction (3). This will give us the numerator of the improper fraction.
5 x 4 = 20
20 + 3 = 23
Therefore, the improper fraction equivalent to 5 3/4 is 23/4.